Article Text

PDF
Original article
Does cadmium exposure contribute to depressive symptoms in the elderly population?
  1. Changwoo Han1,
  2. Youn-Hee Lim2,3,
  3. Yun-Chul Hong1,2,3
  1. 1Department of Preventive Medicine, Seoul National University College of Medicine, Seoul, Republic of Korea
  2. 2Institute of Environmental Medicine, Seoul National University Medical Research Center, Seoul, Republic of Korea
  3. 3Environmental Health Center, Seoul National University College of Medicine, Seoul, Republic of Korea
  1. Correspondence to Dr Yun-Chul Hong, Department of Preventive Medicine, Seoul National University College of Medicine, 103 Daehangno, Jongno-gu, Seoul 110-799, Korea; ychong1{at}snu.ac.kr

Abstract

Background To date, the association of the neurotoxic agent cadmium (Cd) with depression in elderly people has been poorly evaluated. By investigating the relationship between blood cadmium levels and scores on a depression screening test, we aimed to investigate the impact of cadmium exposure on elderly depression.

Methods From 2008 to 2010, a total of 395 elderly participants residing in Seoul, Korea, were evaluated 3 times. Demographic data and lifestyle information were obtained via a systemised questionnaire, and blood samples were collected for analysis. Participants underwent the Korean Version of the Short Form Generic Depression Scale test (SGDS-K) for screening depression and associations were estimated using logistic regression models adjusted for potential confounders.

Results Blood cadmium levels were associated with depressive symptoms in the first visit data analysis. By analysing the first visit data, the highest quartile blood cadmium group (Q4) showed increased risk for depressive symptoms compared to the lowest quartile group (Q1) (OR 3.50, 95% CI 1.22 to 10.00). However, the data of the second and third visits suggested that blood cadmium may be protective against depressive symptoms (second visit data, Q4 vs Q1, OR 0.78, 95% CI 0.19 to 3.14; third visit data, Q4 vs Q1, OR 0.58, 95% CI 0.04 to 8.77).

Conclusions Owing to inconsistent results in analyses between blood cadmium levels and depressive symptoms, we cannot conclude any solid association between blood cadmium levels and depressive symptoms in the elderly population. To clarify the relationship, other prospective studies are needed in the future.

Statistics from Altmetric.com

Request permissions

If you wish to reuse any or all of this article please use the link below which will take you to the Copyright Clearance Center’s RightsLink service. You will be able to get a quick price and instant permission to reuse the content in many different ways.